Mult-stage printing and dyeing wastewater decolorizing treatment process

A technology for printing and dyeing wastewater and treatment process, which is applied in multi-stage water treatment, textile industry wastewater treatment, water/sewage multi-stage treatment, etc. The effect of filtration and treatment is not ideal, so as to achieve the effect of easy replacement, time saving, easy replacement and maintenance

Inactive Publication Date: 2019-10-22
容健美
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the patent application publication number: CN102863104A, the printing and dyeing wastewater treatment process is disclosed. In the invention, the wastewater is treated in multiple stages, but the effect of the treatment is not ideal. The COD is 32mg / L and the chroma is 15; The filter equipment used cannot perform graded treatment and filtration of waste liquids with different turbidity levels, which reduces work efficiency; secondly, it is impossible to complete the drying and rapid cooling of sedimentation and slag discharge, which is conducive to its rapid treatment and brings great benefits to the entire process. The problem of convenience; therefore, a multi-stage printing and dyeing wastewater decolorization treatment process is designed

Method used

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  • Mult-stage printing and dyeing wastewater decolorizing treatment process
  • Mult-stage printing and dyeing wastewater decolorizing treatment process
  • Mult-stage printing and dyeing wastewater decolorizing treatment process

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Embodiment 1

[0043] A multistage printing and dyeing wastewater decolorization treatment process, comprising the following steps:

[0044] S1: The pH value of the printing and dyeing wastewater before treatment is 10, the BOD is 1840, the SS suspended matter is 420, and the chroma is 1000. Discharge the printing and dyeing wastewater into the regulating tank to adjust the flow of the wastewater;

[0045] S2: Pass the wastewater in the adjustment tank into the neutralization tank, and neutralize the printing and dyeing wastewater with dilute sulfuric acid until the pH is 8.0;

[0046] S3: Pass the wastewater in the neutralization tank into the sedimentation tank, add coagulant to the sedimentation tank, the input volume ratio of coagulant to wastewater is 0.5:1000, stir the water tank at a speed of 80r / min for 30min, and let it settle 2h, and transport the sediment to the drying equipment;

[0047] S4: Pass the waste liquid in the upper layer of the sedimentation tank into the filter equip...

Embodiment 2

[0054] A multistage printing and dyeing wastewater decolorization treatment process, comprising the following steps:

[0055] S1: The pH value of the printing and dyeing wastewater before treatment is 10, the BOD is 1840, the SS suspended matter is 420, and the chroma is 1000. Discharge the printing and dyeing wastewater into the regulating tank to adjust the flow of the wastewater;

[0056] S2: Pass the wastewater in the adjustment tank into the neutralization tank, and neutralize the printing and dyeing wastewater with dilute sulfuric acid until the pH is 6.5;

[0057] S3: Pass the wastewater in the neutralization tank into the sedimentation tank, add coagulant to the sedimentation tank, the input volume ratio of coagulant to wastewater is 3:1000, stir the water tank at a speed of 30-80r / min for 10min, statically Place the sediment for 0.5h, and transport the sediment to the drying equipment;

[0058] S4: Pass the waste liquid in the upper layer of the sedimentation tank in...

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Abstract

The invention discloses a multi-stage printing and dyeing wastewater decolorizing treatment process, which comprises: S1, discharging printing and dyeing wastewater into an adjusting pool, and adjusting the flow rate of the wastewater; S2, introducing the wastewater in the adjusting pool into a neutralization pool, and neutralizing the printing and dyeing wastewater with dilute sulfuric acid to achieve a pH value of 6.5-8.0; and S3, introducing the wastewater in the neutralization pool into a precipitation pool, adding a coagulant into the precipitation pool, stirring the water tank for 10-30min at a rate of 30-80 r/min, carrying out standing precipitation for 0.5-2 h, and transporting the precipitate to drying equipment. According to the present invention, wastewater is subjected to multi-stage treatment of chemical flocculation, first filtration, decolorizing, second filtration, catalytic oxidation and the like on the basis of related equipment, such that the treated wastewater easily meet the standard discharge, and can meet the requirements of production water reuse, such that the process provides a set of the efficient and stable solutions for printing wastewater.

Description

technical field [0001] The invention relates to the technical field of decolorization treatment of printing and dyeing wastewater, in particular to a multi-stage decolorization treatment process of printing and dyeing wastewater. Background technique [0002] Printing and dyeing wastewater refers to the wastewater discharged during the pretreatment, dyeing, printing and finishing processes of cotton, wool, chemical fiber and other textile products. One of the notable features of printing and dyeing wastewater is its relatively high chroma. [0003] In the patent application publication number: CN102863104A, the printing and dyeing wastewater treatment process is disclosed. In the invention, the wastewater is treated in multiple stages, but the effect of the treatment is not ideal. The COD is 32mg / L and the chroma is 15; The filter equipment used cannot perform graded treatment and filtration of waste liquids with different turbidity levels, which reduces work efficiency; se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/13C02F103/30
CPCC02F1/28C02F1/283C02F1/286C02F1/32C02F1/44C02F1/441C02F1/52C02F1/5281C02F1/66C02F1/725C02F1/78C02F3/34C02F9/00C02F2103/30C02F2301/08C02F11/13
Inventor 容健美容健宇
Owner 容健美
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